190 
CONTENTS. 
PAGE 
The Female Sexual Okgans continued. 
A, 
thecium and the carpogenic cellj final development of the latter, and production of asci. 
Structure of the mature peritbecium and function of its two cell-layers. Absorption of 
the ascus and discharge of spores 217 
w 
Variations in the relation of the perithecium to the receptacle ; general correspondence 
in the history of its development. Variations in the form of the trichogyne ; its fer- 
r 
tilization, how effected ; results of fertilization in different cases ; variation in number 
of ascogeuic cells produced; the form and position of the latter. Relation of the asci 
to the ascogenic cell; their form. Variations in the number of ascospores; their 
discharge, how effected. Destruction of surrounding cells and of canal cells by 
spore- and ascus-mass. Variations in the development of the perithecium; the latter 
further illustrated by the genus Enarthromyces. Variations in the number of wall- 
cells and their relation to the ascogenic cells; perithecial appendages and out- 
growths; modifications of the lip-cells. Variations in the development and relations 
of the parietal and canal-cells ; their general function ; assumption of a similar func- 
tion by the basal cells of the perithecium ; obliteration of the cavity of the wall-cells. 
Relations of the perithecial cells illustrated by their protoplasmic connections . . . 
SUMMAKY OF THE DEVELOPMENT OF THE PeRITHECIUM AND FeMALE SeXUAL OrGANS 
General relations and character of the cells ; the universal envelope surrounding 
them ; character of the cell wall and presence of fibrillse in certain cases ; absence of any 
test for cellulose. Character of the cell contents; protoplasmic continuity ; nuclei • . 234 
Abnormal Morphology and Development 237 
Abnormal septation in the receptacle and branching of the appendages. Accessory peri- 
" thecia, of two kinds. Abnormal increase in number of antheridia; abnormal production 
of the latter from the basal cells of the perithecium; abnormal filaments similarly pro- 
duced; substitution of an antheridial appendage for the perithecium. Atrophy of one 
individual of a spore pair 237 
Nor:vial Variations. Such are influenced largely by size and character of host and 
position of growth , / 239 
Eate of Growth and Duration of Life Period ..... 240 
224 
233 
Geographical DrsTRicuTroN ^ 241 
General distribution; distribution by continents. Range of species; local occurrence . - .. 243 
Hosts of LABouLBENiACEiE ^ ^ 244 
Hosts in general. Table of host-insects. Comparison of representation of the genera among 
different insect groups. Host habitats- Relation of parasite to host in recjard to nutri- 
tion and to position of growth, the latter often invariably fixed ; relation of hosts to type- 
forms 
244 
Parasites of Laboulbeniace^ . . 247 
Collection of Laboulbeniace.^. Their cultivation and preparation for examination, or for 
the herbarium 248 
